Company lists · Data refreshed September 2026

Top 25 Corporate sustainability consultancies worldwide

Name: Corporate sustainability consultancies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 27, 2026 28,449 companies tracked

RevenueBase identified 28,449 corporate sustainability consultancies worldwide as of September 2026 and tracks 366,801 professional contacts across them, including 134,367 with verified work emails. The United States is the largest market and London the largest hub.

This list covers corporate sustainability consultancies worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 27, 2026. Country and city lists for corporate sustainability consultancies follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 27, 2026 86% judged on-target in blind review

28,449Companies

366,801Contacts tracked

134,367Verified emails

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The 25 largest corporate sustainability consultancies worldwide

Ranked by team size

Top 25 of 28,449 corporate sustainability consultancies worldwide, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to corporate sustainability consultancies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Arcadis	Indirect evidence	Amsterdam, NetherlandsHQ checked Sep 27, 2026	10001+	33,846 contacts →
	Indirect evidence “Arcadis is a leading global partner, delivering transformative projects with businesses, cities and industries.” Source: RevenueBase Database · checked Sep 27, 2026
2	Stantec	Indirect evidence	Edmonton, AB, CanadaHQ checked Sep 27, 2026	10001+	28,416 contacts →
	Indirect evidence “Stantec empowers clients, people, and communities to rise to the world’s greatest challenges at a time when the world faces more unprecedented concerns than ever before.” Source: RevenueBase Database · checked Sep 27, 2026
3	Engie Solutions France	Indirect evidence	La Garenne-colombes, FranceHQ checked Sep 27, 2026	10001+	12,011 contacts →
	Indirect evidence “Les activités Infrastructures Energétiques Locales d’ENGIE accompagnent les collectivités, les industries et le secteur du bâtiment sur la voie de la décarbonation.” Source: RevenueBase Database · checked Sep 27, 2026
4	WSP In The U.S	Indirect evidence	New York, NY, United StatesHQ checked Sep 27, 2026	10001+	9,318 contacts →
	Indirect evidence “What if you could shape built and natural environments – and the future of those that use them?” Source: RevenueBase Database · checked Sep 27, 2026
5	ERM	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	5,001-10,000	9,119 contacts →
	Partial evidence “Sustainability is our business.” Source: RevenueBase Database · checked Sep 27, 2026
6	Roland Berger	Indirect evidence	Munich, GermanyHQ checked Sep 27, 2026	1,001-5,000	4,632 contacts →
	Indirect evidence “Roland Berger is the only leading global strategy consultancy of European origin.” Source: RevenueBase Database · checked Sep 27, 2026
7	SLR Consulting	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	1,001-5,000	3,848 contacts →
	Partial evidence “SLR is a committed partner in our clients’ sustainability journeys.” Source: RevenueBase Database · checked Sep 27, 2026
8	Urbaser	Indirect evidence	Madrid, SpainHQ checked Sep 27, 2026	10001+	3,168 contacts →
	Indirect evidence “Urbaser es uno de los líderes mundiales en gestión medioambiental, una compañía global orientada a la sostenibilidad, que da servicio a más de 50 millones de personas en 20 países…” Source: RevenueBase Database · checked Sep 27, 2026
9	APTIM	Indirect evidence	Baton Rouge, LA, United StatesHQ checked Sep 27, 2026	1,001-5,000	2,639 contacts →
	Indirect evidence “APTIM enhances the quality of the environment, wellbeing of people, resilience of communities, and opportunity for employees to make a difference, not just a living.” Source: RevenueBase Database · checked Sep 27, 2026
10	Ambipar	Indirect evidence	Sao Paulo, BrazilHQ checked Sep 27, 2026	10001+	2,599 contacts →
	Indirect evidence “Our mission is to promote ecological transformation by investing in decarbonization projects, circular economy, energy transition, and environmental regeneration.” Source: RevenueBase Database · checked Sep 27, 2026
11	BDO Nederland	Indirect evidence	Eindhoven, NetherlandsHQ checked Sep 27, 2026	1,001-5,000	2,428 contacts →
	Indirect evidence “At BDO, we help people and organisations achieve their sustainable future.” Source: RevenueBase Database · checked Sep 27, 2026
12	Frost & Sullivan	Indirect evidence	San Antonio, TX, United StatesHQ checked Sep 27, 2026	1,001-5,000	2,330 contacts →
	Indirect evidence “For over six decades, Frost & Sullivan has helped the world’s top companies toward transformational growth journeys that result in a stream of innovative growth opportunities.” Source: RevenueBase Database · checked Sep 27, 2026
13	Mckinstry	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 27, 2026	1,001-5,000	2,213 contacts →
	Indirect evidence “We're a national construction and energy services company dedicated to innovating the waste and climate harm out of the built environment.” Source: RevenueBase Database · checked Sep 27, 2026
14	Baringa	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	1,001-5,000	2,179 contacts →
	Indirect evidence “Baringa is a global consulting firm that helps leaders drive meaningful change and create value.” Source: RevenueBase Database · checked Sep 27, 2026
15	Clearesult	Partial evidence	Austin, TX, United StatesHQ checked Sep 27, 2026	1,001-5,000	2,121 contacts →
	Partial evidence “CLEAResult is the largest provider of energy efficiency, energy transition and energy sustainability services in North America.” Source: RevenueBase Database · checked Sep 27, 2026
16	Ricardo	Indirect evidence	West Sussex, United KingdomHQ checked Sep 27, 2026	1,001-5,000	2,104 contacts →
	Indirect evidence “Ricardo, a member of @WSP, is a global engineering company, specialising in complex propulsion, driveline and energy systems, delivering high integrity solutions for customers…” Source: RevenueBase Database · checked Sep 27, 2026
17	BBA Consultants	Indirect evidence	Mont-saint-hilaire, QC, CanadaHQ checked Sep 27, 2026	1,001-5,000	1,863 contacts →
	Indirect evidence “We help companies with their challenges and transformation by relying on our sharp business acumen, extensive practical experience and vast technological curiosity.” Source: RevenueBase Database · checked Sep 27, 2026
18	Ecovadis	Indirect evidence	Paris, JapanHQ checked Sep 27, 2026	1,001-5,000	1,854 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 27, 2026
19	Swca Environmental Consultants	Indirect evidence	Phoenix, AZ, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,629 contacts →
	Indirect evidence “Founded on a commitment to sound science and creative solutions, SWCA is a leader in environmental and management consulting services.” Source: RevenueBase Database · checked Sep 27, 2026
20	Montrose Environmental Group	Indirect evidence	Little Rock, AR, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,529 contacts →
	Indirect evidence “Onterris (formerly Montrose Environmental Group) was one of the first to see environmental responsibility as not just an imperative but as a strategic asset.” Source: RevenueBase Database · checked Sep 27, 2026
21	Adec Innovations	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,304 contacts →
	Indirect evidence “ADEC Innovations seamlessly delivers fully integrated, cost-effective industry expertise, business process & data management, and software services.” Source: RevenueBase Database · checked Sep 27, 2026
22	RSK Group	Indirect evidence	Helsby, United KingdomHQ checked Sep 27, 2026	10001+	1,255 contacts →
	Indirect evidence “RSK Group is a global leader in the delivery of environmental and engineering solutions.” Source: RevenueBase Database · checked Sep 27, 2026
23	DGE Danmark	Indirect evidence	Højbjerg, DenmarkHQ checked Sep 27, 2026	n/a	1,176 contacts →
	Indirect evidence “Miljø er vores kernekompetence og vores ansvar.” Source: RevenueBase Database · checked Sep 27, 2026
24	OLA	Partial evidence	Austin, TX, United StatesHQ checked Sep 27, 2026	n/a	1,145 contacts →
	Partial evidence “OLA Sustainability, LLC OLA Sustainability is a consulting firm that focuses on integrating sustainable practices into commercial and multifamily design projects.” Source: RevenueBase Database · checked Sep 27, 2026
25	Verdantas	Indirect evidence	Tampa, FL, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,139 contacts →
	Indirect evidence “At Verdantas, we blend engineering and environmental science together with advanced technology and world-renowned labs to create solutions with the big picture in mind.” Source: RevenueBase Database · checked Sep 27, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: corporate sustainability consultancies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names corporate sustainability consultancies.
Partial evidence: Its own public description names part of corporate sustainability consultancies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name corporate sustainability consultancies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 28,449 corporate sustainability consultancies worldwide

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Corporate sustainability consultancies worldwide at a glance

As of Sep 27, 2026

36.6%Verified-email coverage

12.9Average contacts per company

1-10Median size (employees)

2.3%Largest-city concentration · London

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

21,025

11-50

5,869

51-200

1,081

201-500

216

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among corporate sustainability consultancies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
Coverage: Every country. Country and city lists for corporate sustainability consultancies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “corporate sustainability consultancies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names corporate sustainability consultancies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among corporate sustainability consultancies, and records with no verified work email.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 134,367 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 27, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Corporate sustainability consultancies by location

139 lists · largest first

Every Corporate sustainability consultancies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names corporate sustainability consultancies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many corporate sustainability consultancies are there worldwide?

RevenueBase identified 28,449 corporate sustainability consultancies worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Arcadis, headquartered in Amsterdam, tops this list with the largest team on record.

Which country has the most corporate sustainability consultancies?

The United States leads with 2,833 companies, followed by Brazil (2,783) and the United Kingdom (1,753). Every corporate sustainability consultancies list by country and city is linked on this page.

Which city has the most corporate sustainability consultancies?

London leads with 642 headquartered companies, followed by Sao Paulo (505) and Paris (447).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 134,367 verified decision-maker contacts tracked across these 28,449 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 27, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.